#  A. A math teacher gave her class two tests. 25% of the class passed both tests and 42 % of the class passed the first test. What percent of those.

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 A. A math teacher gave her class two tests. 25% of the class passed both tests and 42 % of the class passed the first test. What percent of those who passed the first also passed the second test?

 B. A jar contains black and white marbles. Two marbles are chosen without replacement. The probability of selecting a black marble and then a white marble is 0.34, and the probability of selecting a black marble on the first draw is 0.47. What is the probability of selecting a white marble on the second draw, given that the first marble drawn was black?

 C. The probability that it is Friday and that a student is absent is 0.03. Since there are 5 school days in a week, the probability that it is Friday is 0.02. What is the probability that a student is absent given that today is Friday?

 D. A coin is tossed. If it shows heads, a marble is drawn from Box 1, which contains one white and one black marble. If it lands tails, a marble is drawn from Box 2, which contains two white and one black marble. Find:   a. P(black l coin fell heads)   b. P(white l coin fell tails)

 E. A die is tossed. Find P(less than 5 l even).

 F. A number is selected, at random, from the set {1, 2, 3, 4, 5, 6, 7, 8}. Find  a. P(odd)   b. P(prime l odd)

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